Plug cap



FIG. 1 is a side top perspective view of a plug cap in accordance with the present design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a side elevational view thereof, the side opposite being identical thereto; and,

FIG. 5 is a sectional view taken in the direction of the arrows on line 5--5 of FIG. 2. 

The ornamental design for a plug cap, as shown and described. 